dlog

It's the D Logger - simple logger pkg to setup four handlers for your basic logging needs:

Trace
Info
Warning
Error

Example

package main

import (
    "flag"
    "io/ioutil"
    "os"

    "github.com/vmogilev/dlog"
)

func main() {
    var myVar string
    var debug bool

    flag.StringVar(&myVar, "myVar", "", "Mandatory Var")
    flag.BoolVar(&debug, "debug", false, "Debug")
    flag.Parse()

    if debug {
        dlog.Init(os.Stdout, os.Stdout, os.Stdout, os.Stderr)
    } else {
        dlog.Init(ioutil.Discard, os.Stdout, os.Stdout, os.Stderr)
    }

    if myVar == "" {
        dlog.Error.Fatalf("myVar is needed! Exiting ...")
    }

    dlog.Info.Printf("thanks - got myVar=%s\n", myVar)
}

Example Output of Above

# dlog-example
ERROR: 2015/06/11 16:33:06 main.go:26: myVar is needed! Exiting ...

# dlog-example --help
Usage of dlog-example:
  -debug=false: Debug
  -myVar="": Mandatory Var

# dlog-example --myVar="Here You Go"
INFO: 2015/06/11 16:33:57 main.go:29: thanks - got myVar=Here You Go

License

The MIT License